Why is the injection site painful after administering GHK Cu (Glycyl L Histidyl L Lysine Copper) 2mg mixed with normal saline? Best GHK Cu Peptide Cream Texas InjectCo Aesthetics GHK Cu Copper Peptide Benefits, Uses & Safety Intra V GHK Cu Injectable Team Wellcore If your GHK injection site gets irritated try this , 1. Dilute it by adding more water to the syringe , 2. Let it sit until it reaches room temperature , Also, make sure youre rotating injection GHK CU Beverly Hills Rejuvenation Center